Cloudy water??

[marie]

Any ideas on how to get the water in my 90gal LPS tank clearer. It has what looks like floating particles in it. The tank has an overflow box into a 20gal sump. In the sump is a Precision Marine Skimmer, live rock and three baffles forcing the water through filter media. I also have a turbo twist 18w uv sterilizer running off a 1200 maxi powerhead.
Any suggestions would be great.

[matt]

Could be several things; did you recently add alot of buffer and/or calcium additive? Is it algae? Microbubbles? Did it suddenly happen or gradually get worse?

[marie]

It's been a kinda constant thing. Didn't add any buffer or calcium it's just always like that. I was thinking it might be microbubbles but I can't find the source.

[GaryP]

Could your return pump be sucking up bubbles from your overflow lines leading to the sump?